Heavy-duty technical drawings and architectural plans.
Rapid sketching and "zipped" (compressed) idea journaling. B59zip
If "B59zip" were a technical standard or a code snippet, the "paper" would be a research document. Heavy-duty technical drawings and architectural plans
A unique "Zip-Edge" binding—instead of a standard spiral or glue, the pages are held together by a slide-lock mechanism that allows you to remove and re-insert pages anywhere in the notebook without tearing them. B59zip